<template>
<div>
  <div class="search">
        <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音" />
  </div>
  <div class="search-content" ref="search" v-show="keyword">
    <ul>
      <li class="search-item border-bottom"
      v-for="item of list"
      :key="item.id"
      @click="handleCityClick(item.name)"
      >{{item.name}}</li>
      <li class="search-item border-bottom" v-show="hasnodata">
        没有找到匹配城市
      </li>
    </ul>
  </div>
</div>
</template>

<script>
import BScroll from 'better-scroll'
 import { mapState, mapMutations } from 'vuex'
  export default{
  	name:'CitySearch',
    props:{
      cities:Object
    },
    data() {
      return{
        keyword:'',
        list:[],
        timer:null
      }
    },
    computed:{
      hasnodata(){
        return !this.list.length
      }
    },
    watch:{
      keyword(){
        if(this.timer){ //函数截流
          clearTimeout(this.timer)
        }
        if(!this.keyword){
          this.list = []
          return
        }
        this.timer = setTimeout(() => { //函数截流 正在做手指滚动如果在16毫秒以内再次进行，清除掉上次的操作，立即执行现在的
          const result = []
          for (let i in this.cities){
            this.cities[i].forEach((value) => {
              if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1){
                  result.push(value)
              }
            })
          }
          this.list = result
        },100)
      }
    },
    methods:{
      handleCityClick (city) {
       // this.$store.dispatch('changeCity',city) //调用changecity
          this.changeCity(city)
          this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
      },
    mounted () {
      this.scroll = new BScroll(this.$refs.search)
    }
  }
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .search
    height :.72rem
    padding : 0 .1rem
    background :$bgcolor
    .search-input
      box-sizing :border-box
      height :.62rem
      line-height :.62rem
      padding : 0 0.1rem
      width :100%
      text-align :center
      border-radius :.06rem
      color :#666666
  .search-content
    overflow :hidden
    position :absolute
    top :1.58rem
    left :0
    right :0
    bottom :0
    z-index :1
    background :#EEEEEE
    .search-item
       line-height :.62rem
       padding-left :.2rem
       background :#fff
       color :#666
</style>
